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; RUN: opt %loadPolly -polly-stmt-granularity=bb -polly-import-jscop -polly-import-jscop-postfix=transformed -polly-print-simplify -disable-output < %s | FileCheck -match-full-lines %s
;
; Do not combine stores if there is a read between them.
; Note: The read between is unused, so will be removed by markAndSweep.
; However, searches for coalesces takes place before.
;
; for (int j = 0; j < n; j += 1) {
; A[0] = 42.0;
; tmp = A[0];
; A[0] = 42.0;
; }
;
define void @nocoalesce_readbetween(i32 %n, double* noalias nonnull %A) {
entry:
br label %for
for:
%j = phi i32 [0, %entry], [%j.inc, %inc]
%j.cmp = icmp slt i32 %j, %n
br i1 %j.cmp, label %body, label %exit
body:
store double 42.0, double* %A
%tmp = load double, double* %A
store double 42.0, double* %A
br label %inc
inc:
%j.inc = add nuw nsw i32 %j, 1
br label %for
exit:
br label %return
return:
ret void
}
; CHECK: Statistics {
; CHECK: Overwrites removed: 0
; CHECK: Partial writes coalesced: 0
; CHECK: }
; CHECK: After accesses {
; CHECK-NEXT: Stmt_body
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
; CHECK-NEXT: [n] -> { Stmt_body[i0] -> MemRef_A[0] };
; CHECK-NEXT: new: [n] -> { Stmt_body[i0] -> MemRef_A[0] : i0 >= 17 };
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
; CHECK-NEXT: [n] -> { Stmt_body[i0] -> MemRef_A[0] };
; CHECK-NEXT: new: [n] -> { Stmt_body[i0] -> MemRef_A[0] : i0 <= 16 };
; CHECK-NEXT: }
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